Finding the Fourth Proportional to 109,641.78, 151,305.61 and 59,340.78

Step by Step Solution

1. Step 1: Write the proportion equation
   109,641.78 : 151,305.61 = 59,340.78 : x
2. Step 2: Convert to fraction form
   109,641.78/151,305.61 = 59,340.78/x
3. Step 3: Cross multiply
   109,641.78x = 151,305.61 × 59,340.78
4. Step 4: Simplify right side
   109,641.78x = 8,978,592,915.78
5. Step 5: Solve for x
   x = 8,978,592,915.78/109,641.78
6. Step 6: Final answer
   x = 81,890.25